Hi Jan,
See if the "Deleting in an Iterator" section at:
http://cayenne.apache.org/doc/deleting-objects.html
will help you.
/dev/mrg
On Nov 19, 2007 1:48 PM, Jan Lendholt <jlendhol..otmail.com> wrote:
> Hey folks,
>
> I got pretty frustrated in the meantime with cayenne, as i think there are happing some pretty ugly thingsin cayenne's internals.
>
> At first, I again need help on deleting objects with relationships.
>
> Let's say I've got one table called "booking" with its entity Booking.
> And I've got another table extras with entity Extras.
>
> The relationship is from booking to Extras one to many (1-n entries in Extra for one booking entry).
> I've set both relationships with delete rule to nullify.
>
> Now, sime pseudo-code:
>
> Booking booking = ...;
>
> List<Extras> extras = booking.getExtrasArray();
>
> for (int i= 0;...)
> {
> booking.getDataContext().deleteObject(extras.get(i));
>
> }
>
> commitChanges();
>
> Now, the data are deleted from the database.
> But if I do a booking.getExtrasArray(); again, it still contains the deleted objects; it seems as if they were cached or so :-/
> Even an booking.RemoveFromExtras(extras.get(i)) won't work.
>
> Hiow does the deletion work correctly? I really don't understand why cayenne won't manage that automatically, for it would be quite logic to remove deleted objects form the object graph.
>
> Well, some words about the "ugly things": We had some really strange errors coming up which are at the end quite logic, but do not help finding the problem so wen spent about 3 hours to find it.
> We deleted an entity in the modeler and recreated it. Unfortunately, there was a reference missing. So cayenne just threw an index out of bounds exception. I really don't understand such a behaviour either :/ To me, such kind of errors should be handeled and analyzed automatically by a framework, e.g. like spring does. Ok, that's it for now. Hope you still like me :-D
>
>
> Tahnks a lot in advance & kind regards form Hamburg!
>
> Jan
>
>
>
>
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